Decades ago McDonald's realized that food wasn't the only way to draw kids into its restaurants. Toys, playgrounds, and cartoon characters all help the cause, and now a Brazilian food chain called Giraffas has come up with a clever way to lure soccer fans into its restaurants, just in time for the 2014 FIFA World Cup.

After downloading a free app, you can prop your smartphone up on its side on one end of the serving tray, allowing its front-facing camera to detect the soccer field graphics on the paper insert. Folded paper balls are torn off the edge of the placemat, and can actually be flicked at a virtual on-screen goalie, with the camera detecting their motion and determining whether a goal has been scored.

Do you want fries with that? No, but a few thousand screaming supportive fans wouldn't hurt. [YouTube via DamnGeeky]